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US2825728A
Expired / Lapsed
US
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Alkylene bis benzoxazine compounds
Assignee: Dow Chemical Co
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Filing: 1956-12-12
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Granted: 1958-03-04
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Expires: 1976-12-12
Abstract
No abstract record available.
Inventors
- 👤 Raymond H Rigterink
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:05
CPC Classifications
C; C07; C07D; C07D265/00; C07D265/04; C07D265/12; C07D265/14; C07D265/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
8 words
A BENZOXAZINE A MEMBER OF THE GROUP CONSISTING
Claim 2
Dependent Claim
8 words
A BENZOXAZINE A MEMBER OF THE GROUP CONSISTING
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-03 | 1961-09-02 | 1962-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-03 | 1965-09-02 | 1966-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-03 | 1969-09-02 | 1970-03-04 | $7700.00 | Window Closed / Lapsed |